The Kiehl’s Badwater Ultramarathon is, and always has been, an invitational race. Applicants will be considered purely upon their race application and its specific written merits. No applicant is guaranteed entry, including race veterans.
The selection process begins on January 7, 2008 and ends on January 28, 2008. A committee of five race staff members, one of which is the race director, will review and rank each application on a scale of 0 to 10. The ranks will be tallied on February 15 and the top 80 applicants with the highest scores will be invited. At that time, or later, up to ten more applicants may be invited at the race director’s discretion.
All the application info: http://www.badwater.com/reg.html